周辺の天然記念物・トップ20

The Aachquelle is the largest spring in Germany.

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The present ruins of the summit castle are located on the summit of the 644 m high Hohenkrähen ("Krayen"), a mountain of volcanic origin north of Singen in the Hegau, between the villages of Duchtlingen, Schlatt unter Krähen and Mühlhausen in the Duchtlingen district.

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Steep but well-secured stone path to the castle ruins.

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Shady spot with a small kiosk. Ideal for taking a break. 😉

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It is worth a visit, entrance costs 5 euros

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A very nice cycle path

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With an average flow rate of ten cubic meters per second, the Radolfzeller Ach is the fourth largest inflow into Lake Constance.

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The Lake Constance area is very nice here

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Great photo opportunities at every corner and a super nice view

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Very crisp and quite demanding ascent, with holding aids attached to the critical passages.

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Quite an impressive facility. Compared to the ruins of the neighboring mountains, this complex looks spruced up, and there is also an entrance fee. Halfway up you can buy a drink or snack from the ticket kiosk.

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Just great at the spring, I had never seen so much water straight from the ground.

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Beautiful view of Lake Constance in the Aach estuary nature reserve.

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You almost cycled past, but here the Aach flows into Lake Constance.

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Information board on the situation of the remains of the wall of the small outer bailey, which are clearly visible there.

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Most of the water 🌊 escaping in the Aachtopf comes from the infiltration points of the Danube at the weir and in Brühl near Immendingen and Fridingen on the Danube. The Aachtopf 🌊 is the most heavily pouring karst spring in Germany with an average discharge of around 8000 l / s (min. 1310 l / s, max. 24 100 l / s) and a catchment area of around 280 km2. On its underground path, the water dissolves some 1000 m3 of limestone every year. To the north of the source pot, banked limestones of the lying bank limestone formation (formerly Weißjura zeta 1) and massive limestones of the upper mass limestone above. From the outflow of the spring, divers first came 17 m deep, then diagonally to the north into a water cave 1–3 m wide, 3–6 m high and over 500 m long. About 500 m north of the source of the Aach there are several large subsidence. Two approx. 20 m deep sinkholes with diameters over 40 m are sunk into the layers of rough limestone within the cement marl formation (formerly Weißjura zeta 2); the limestones are clearly visible on the walls of the sinkholes. Their formation is probably related to the karstification and lime dissolution by the karst waters that emerge at the Aachtopf. A group of cave explorers succeeded a few years ago - starting from one of the two sinkholes - with a 105 m deep shaft to work their way to the underground karst waters.

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Great photo opportunities were almost all alone in the afternoon endless people

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More information under the following link: https://de.m.wikipedia.org/wiki/Hohenhewen

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Based on the remains of the old north tower of the castle, a viewing platform was built at the end of the 19th century that towers over the remains of the castle and the trees and gives an unbelievably wide view of the landscape.

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The ascent is tough, but the unbelievably wide view over the Hegau definitely makes up for the effort.

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